Regenerative hot-blast stove.



PATENTED JUNE l1, 1907.

P. G. ROBERTS.

RBGBNBRATIVB HUT BLAST STOVE.

APPLIOATION FILED FEB. 25, 1907.

2 SHEETS-sum1.

WITNESSES:

me NaRRls Pzrsns co..'wAsmNcmN. n. c.

PATENTED JUNE 11, 1907'.

P. o. ROBERTS.

REGENERATIVB HOT BLAST strov.

APPLICATION FILED FEB. Z5, 1907.

2 SHEETS-SHEET 2.

INVENTOR:

WITNESSES:

Kfm

1HE Nofms Fsrsns co., wAsulNcroN, n. c.

FRANK O. ROBERTS, OF PHILADELPHIA, PENNSYLVANIA.

REGENERATIVE HOT-BLAST STOVEl Specification of Letters Patent.

Patented June 11, 1907.

Application filed February 25, 1907. Serial No 359,321..

T0 a/ZZ whom t may 0077/067471:

Be it known that I, FRANK C. ROBERTS, a r citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Regenerative Hot-Blast Stoves, of which the following is a specification, reference being had to the accompanying drawings.

In said drawings, Figure l represents a vertical section through the stove on the line X X of Fig. 4. Fig. 2 is a central vertical section through the stove on the line Y Y of Fig. 4. Fig. 3 is an irregular horizontal section upon two diderent planes indicated by the line Z Z in Fig. 1. Fig. 4 is a horizontal section on line U U of Fig. 2'. Figs. 5, 6, 7, 8, 9, l0, 11 and 12 represent horizontal sections through stoves wherein the number and arrangement of walls and compartments is varied as hereinafter explained.

The stove is cylindrical in form and its chief characteristics are that it has a central combustion chamber with regenerators located around the combustion chamber, said regenerators being so arranged and connected that when gas is burned in the combustion chamber, the products of combustion on leaving the combustion chamber pass downward through certain of said regenerators and thence upward through the remaining chambers to the upper part of the stove and thence' to the chimney located at ythe top of the stove.

Referring to the drawings, A represents the exterior metal shell of the stove and B the exterior metal shell ofthe chimney.4

C is the combustion chamber formed by the circular wall D within the inclosing walls E.

F are sections of chord walls extending horizontally from the outside wall G to the walls E and vertically from the bottom to near the top of the stove. These walls F divide the space between the walls G and E into eight compartments. By reference to Fig. 4 it will be seen that four of theseA compartments marked H are rectangular in horizontal section while the remaining four compartments I are approximately of quadrant shape in horizontal section. The walls F terminate near the top of the stove 1n twov archesJ, located at right angles to each other, extending entirely across the diameter of the stove between the walls G, the intersection of the arches being central with the center of the stove, the whole so constructed that free access and communication is provided between the top of the combustion chamber O and the tops of the four rectangular compartments H and that access and communication between the top of O and the tops of the quadrant shaped compartments I is prevented. As indicated, the walls are supported on the stove bottom; at or near the bottom of walls F, openings K are provided whereby access and communication is furnished between the bottoms of compartments H and the bottoms of compartments I. Near the top of the stove, compartments I communicate with the space L which space in turn communicates with the chimney M.

Oompartments H and I form the regenerator chambers and the filling forming the regenerators 'may be constructed in any approved manner and in accord with any suitable design, and is therefore not described in detail. aid regenerators may be supported in any approved manner. In the drawings the regenerators in compartments H are shown as supported by lintels N and piers O while the regenerators in compartments I are suCpporte'd by lintels N and arches P.'

Piers may be provided with arched openings R. The regenerators in com artments H terminate at or near the top ol the combustionchamber O in such a manner as to leave free communications between O and the regenerators in H. The regenerators in compartments I terminate at or near the top of the arches J; free communication b'e tween the regenerators in I and the space L being provided.

At the bottom ofthe stove four arched openings (a) are provided leading from the outer walls G to thel combustion chamber O.; as shown on the drawings these openings are formed by arches (b) extending between walls F and under compartments H, the walls F being thickened to carry the arches. It is to be noted that the arched openings (a) are so constructed as to communicate only with C and in no case with H or I. The gas inlet S and the hot blast outlet T comm-unic'ate with C through openings (a) as indicated while air doors or cleaning doors (e) likewise communicate with C in a similar manner. The slopingwalls -V are provided under I-I and I to facilitate the removal` of dirt from H IOO by delivering the dirt under I -from whence it may be removed through doors (f). Cleaning doors (f) are also provided at the top of the stove for cleaning purposes. The chim ney Mis provided with a valve (g); the cold air blast enters the stove by means of air pipe (h) equipped with valve UV); all as indicated.

The vmethod of operation is as iollowsz- The air inlet valve (/L) and the hot blast outlet T being closed and the chimney valve `(g) and the valve of gas inlet S being open, the combustible gas passes into C where it comes in contact with air admitted through one' or more of the arched openings (a) and is ig-' nited. From C the products of combustion pass downward through the regenerators in compartments H and thence upward through the regenerators in compartments I into L and from thence escape to the atmosphere through chimney M. This direction of the currents while the stove is on gas is of course reversed when the stove is on blast. 'In the latter event, the chimney valve (g) and the valve ofthe gas inlet S being closed and the air inlet valve (h andthe hot blast outlet T being opened, the air enters L and passes downward throughthe regenerators in compartments I, thence upward through the regenerators in compartments H and thence downward through C to one of the arched openings (a) whence it finds its exit through the hot blast -outlet T. If desired, partial or complete combustion may be effected in the arched opening y (a) to which the gas inlet is connected by means of air openings leading into said arched" opening (a). y

Among the advantagesarising from the above described construction are the following2fThe central combustion chamber concentrates the heat of combustion in the center of the stove7 the radiation therefrom being outward into the regenerators. Again it is evident that all regenerators being in contact with the outer wallsv G, said regenerators are readily accessible for cleaning through openings in A and G above and under the regenerators. Further the cleaning of the regenerators is facilitated by the ready communication which exists lbetween the spaces under the regenerators and the ease with which dirt in the regenerators in com.- partments H may be removed from the stove by means of 'the cleaning doors communieating with the space under the regenerators in compartments I. e

It is evident that it is possible .to vary the number and arrangement of walls F which divide the space between walls Cr and E into compartments for use as regenerators. I have indicated several possible variations in Figs. 5, 6, 7, 8, 9, 10, 11. and 12. Figs. 5, 7, 9 and ll are sections on lines corresponding to lineW 7" of Fig. l. Figs. 6, 8,10 and l2 are sections on lines corresponding to lineU U of Fig. 2. Figs. 5 and@ show Walls whereby two regenerator compartments are provided. Figs. 7 8, 9 and l0 show walls whereby four regenerator compartments are provided and Figs. 11 and l2 show walls whereby six regenerator compartmentsA are provided. In all of these instances, as in Figs. l, 2, 3 and 4., .the products of combustion pass from the top oi the central combustion chamber C into and downward through the regenerators H thence through openings K and upward through regenerators I from whence they pass to the chimney.

For the sake of clearness I desire to denominate the regenerators in compartments H through which the products of combustion pass downward as down-pass regenerators and the regenerators in compartments I through which the products of combustion pass upward asup-pass regenerators. v

I do not limit the combustion chamber in horizontal section to the circular shape shown on the drawings; it may be rectangular in cross section or any other suitable shape.

Having vfully described my invention, what I claim, andA desire to cover by Letters Patent, is

1. In a hot blast stove, the combination of an outside wall, a central combustion chamber surrounded by a wall, four down-pass regenerators communicating with the top of said combustion chamber, four up-pass regenerators communicating with the bottom of said down-pass regenerators, a chimney arranged above and communicating with said up-pass regenerators, said eight regenerators being placed in compartments surrounding the combustion chamber and eX- ICO tending to said outside wall and formed by walls extending Jfrom said outside wall to said wall surrounding the combustion chamber.

2. In a hot blast stove, the combination of an outside wall, a central combustion chamber surrounded by a wall, one or more downpas's regenerators communicating with the top of said combustion chamber, one or more up-pass regenerators communicating with the bottom of said down-pass regenerators, a chimney arranged above and communicating With said up-pass regenerators, said down-pass and up-pass regenerators being placed in compartments surrounding said combustion chamber and extending tosaid outside wall and Jformed by walls extending from said outside wall to said wall surrounding the combustion chamber.

3. In a hot blast stove, the combination of an outside wall, a central combustion chamber surrounded by a wall, a series of two or more regenerators surrounding said combustion chamber and extending to said outside IIO ISO

wall and located in compartments formed by t pass regenerators and the 11p-pass regenem- Walls extending fTom said outside Walls to tors anda o'hirnnex7 arranged above and oomsaid Wall surrounding the combustion ehammunicatng with said 11p-pass regenerators. 1o ber, means of communication between the FRANK C. ROBERTS.

top of the combustion chamber and the Witnesses:

down-pass regenerators, means of communi- J. DONALDSON PAXTON,

cation between the bottoms of the doWnl CLARENCE S. BUTLER. 

